Abstract: A truck bed dumping system for converting a vehicle has a bed positioned behind a cab of the vehicle into a dump truck. The system includes a support structure that has at least one pulley attached to the top end. A coupler is fixedly coupled to the forward section of the bed of the vehicle. A pair of support members is fixedly coupled to a bottom surface of a rear section of the bed making the bed pivotable. A winch is fixedly coupled to the frame of the vehicle and positioned adjacent the bottom end of the support structure. A cable for raising and lowering the forward section of the bed is wound about the winch and abuts the pulleys. The winch moves the bed between the raised and lowered positions. An actuator for controlling the winch is positioned in the cab of the vehicle.